Commit Graph

587 Commits

Author SHA1 Message Date
Ruslan Ermilov
12c79eb288 Dike out a highly insecure UCONSOLE option.
TIOCCONS must be able to VOP_ACCESS() /dev/console to succeed.

Obtained from:	OpenBSD
2002-04-03 10:56:59 +00:00
Marcel Moolenaar
5cb87b0c59 Make the kernel dump header endianness invariant by always dumping
in dump byte order (=network byte order). Swap blocksize and dumptime
to avoid extraneous padding on 64-bit architectures. Use CTASSERT
instead of runtime checks to make sure the header is 512 bytes large.
Various style(9) fixes.

Reviewed by: phk, bde, mike
2002-04-03 07:24:12 +00:00
Marcel Moolenaar
daf8eed86e o GC dumplo
o  Replace the string lit. "ia64" with MACHINE
2002-04-03 05:16:09 +00:00
Marcel Moolenaar
b484ea8c69 Use a twiddle to show that we're busy dumping. The initial code
emitted the total number of pages it still had to dump prior to
dumping a block of up to 16 pages. For a 128MB region this would
result in 8M number of printf()s. Barf!

The problem in general is that memory typically has one really
big region and a number of "scattered" smaller regions. Some may
even be just a few pages. The twiddle works best for now, but
it doesn't really give a good progress indication for the large
regions. Those are the cases where you definitely want good PI
to avoid having the user turn into a twiddle :-)
2002-04-03 05:11:59 +00:00
John Baldwin
c53c013bae - Move the MI mutexes sched_lock and Giant from being declared in the
various machdep.c's to being declared in kern_mutex.c.
- Add a new function mutex_init() used to perform early initialization
  needed for mutexes such as setting up thread0's contested lock list
  and initializing MI mutexes.  Change the various MD startup routines
  to call this function instead of duplicating all the code themselves.

Tested on:	alpha, i386
2002-04-02 22:19:16 +00:00
Marcel Moolenaar
a64f21ce5d Initial implementation of the ia64 kernel dumper. The dumper
constructs an ELF image, consisting of the ELF header, for
each memory region a program header, followed by the memory
contents for each region. It does blocked I/O for the headers
as they are typically smaller than DEV_BSIZE.
2002-04-02 10:51:32 +00:00
Marcel Moolenaar
6cb7cf5826 o GC totalphysmem and resvmem.
o  Rephrase comment describing that the memory region can contain
   the kernel.
2002-04-02 07:20:42 +00:00
Matthew Dillon
182da8209d Stage-2 commit of the critical*() code. This re-inlines cpu_critical_enter()
and cpu_critical_exit() and moves associated critical prototypes into their
own header file, <arch>/<arch>/critical.h, which is only included by the
three MI source files that need it.

Backout and re-apply improperly comitted syntactical cleanups made to files
that were still under active development.  Backout improperly comitted program
structure changes that moved localized declarations to the top of two
procedures.  Partially re-apply one of the program structure changes to
move 'mask' into an intermediate block rather then in three separate
sub-blocks to make the code more readable.  Re-integrate bug fixes that Jake
made to the sparc64 code.

Note: In general, developers should not gratuitously move declarations out
of sub-blocks.  They are where they are for reasons of structure, grouping,
readability, compiler-localizability, and to avoid developer-introduced bugs
similar to several found in recent years in the VFS and VM code.

Reviewed by:	jake
2002-04-01 23:51:23 +00:00
John Baldwin
44731cab3b Change the suser() API to take advantage of td_ucred as well as do a
general cleanup of the API.  The entire API now consists of two functions
similar to the pre-KSE API.  The suser() function takes a thread pointer
as its only argument.  The td_ucred member of this thread must be valid
so the only valid thread pointers are curthread and a few kernel threads
such as thread0.  The suser_cred() function takes a pointer to a struct
ucred as its first argument and an integer flag as its second argument.
The flag is currently only used for the PRISON_ROOT flag.

Discussed on:	smp@
2002-04-01 21:31:13 +00:00
Poul-Henning Kamp
8d19a26558 Centralize the "bootdev" and "dumpdev" variables. They are still pretty
bogus all things considered, but at least now they don't camouflage as
being MD variables.
2002-03-31 07:15:28 +00:00
Marcel Moolenaar
12ae303a12 Transition to a model where the loader passes the address of the
bootinfo block in register r8. In locore.s we save the address
in the global variable 'pa_bootinfo'. In machdep.c we compare
this value against the hardwired address, but don't depend on its
validity yet (ie: we still expect the bootinfo block to be at the
hardwired address). After a small amount of time, we'll flip the
switch and depend on the loader to pass us the address. From that
moment on the loader is free to put it anywhere it likes, provided
the machine itself likes it as well.

Add some verbosity to aid in the transition. We emit a message if
the loader didn't pass the address and we also emit a message if
there's no bootinfo block at the hardwired address.

While in locore.s, reduce the number of redundant serialization
instructions. A srlz.i is a proper superset of a srlz.d and thus
is a valid replacement. Also slightly reorder the movl instructions
to improve bundle density.
2002-03-30 23:25:22 +00:00
Jake Burkholder
d0ce9a7e07 Remove abuse of intr_disable/restore in MI code by moving the loop in ast()
back into the calling MD code.  The MD code must ensure no races between
checking the astpening flag and returning to usermode.

Submitted by:	peter (ia64 bits)
Tested on:	alpha (peter, jeff), i386, ia64 (peter), sparc64
2002-03-29 16:35:26 +00:00
David E. O'Brien
ae7c70d595 style(9)
Approved by:	jake
2002-03-28 02:54:44 +00:00
Jeff Roberson
f22a4b62f5 Add a new mtx_init option "MTX_DUPOK" which allows duplicate acquires of locks
with this flag.  Remove the dup_list and dup_ok code from subr_witness.  Now
we just check for the flag instead of doing string compares.

Also, switch the process lock, process group lock, and uma per cpu locks over
to this interface.  The original mechanism did not work well for uma because
per cpu lock names are unique to each zone.

Approved by:	jhb
2002-03-27 09:23:41 +00:00
Matthew Dillon
d74ac6819b Compromise for critical*()/cpu_critical*() recommit. Cleanup the interrupt
disablement assumptions in kern_fork.c by adding another API call,
cpu_critical_fork_exit().  Cleanup the td_savecrit field by moving it
from MI to MD.  Temporarily move cpu_critical*() from <arch>/include/cpufunc.h
to <arch>/<arch>/critical.c (stage-2 will clean this up).

Implement interrupt deferral for i386 that allows interrupts to remain
enabled inside critical sections.  This also fixes an IPI interlock bug,
and requires uses of icu_lock to be enclosed in a true interrupt disablement.

This is the stage-1 commit.  Stage-2 will occur after stage-1 has stabilized,
and will move cpu_critical*() into its own header file(s) + other things.
This commit may break non-i386 architectures in trivial ways.  This should
be temporary.

Reviewed by:	core
Approved by:	core
2002-03-27 05:39:23 +00:00
Marcel Moolenaar
d8869cc205 o Revert previous commit in asm.h. There's no need to undefine
__FBSDID first, because it should not be defined at all,
o  Remove inclusion of cdefs.h in locore.s.

Pointed out by: peter
2002-03-27 02:20:09 +00:00
David E. O'Brien
1640869c31 Get the guarding right. The IA-64 has a different organization for this
than our other platforms.
2002-03-26 02:59:00 +00:00
David E. O'Brien
c543d983fa Guard against redefining __gnuc_va_list. 2002-03-24 11:25:46 +00:00
Marcel Moolenaar
9156494211 Undefine __FBSDID before defining it as it's already defined at
that point.
2002-03-24 10:28:04 +00:00
David E. O'Brien
439a4003ab ASM versions of __FBSDID. 2002-03-23 02:01:27 +00:00
Doug Rabson
6720311838 Change critical_t to register_t for intr_disable/restore. 2002-03-21 09:50:11 +00:00
Doug Rabson
77b51ddfcd Change cpu_critical_enter/exit to intr_disable/restore. 2002-03-21 09:35:18 +00:00
Peter Wemm
c302e53c27 In UP mode, the primary cpu's per-cpu current_pmap was not initialized -
this was only done as a side effect of calling cpu_mp_start().  I haven't
actually tested that this fixes UP kernels, but it feels about right.
2002-03-21 07:41:02 +00:00
Jeff Roberson
eca80f82ea Remove references to vm_zone.h and switch over to the new uma API.
Approved by:	peter
2002-03-21 02:46:56 +00:00
Alfred Perlstein
e41ed5da90 Remove __P.
Reviewd by: peter
2002-03-20 23:30:31 +00:00
John Baldwin
f25fcd64b8 Change the way we ensure td_ucred is NULL if DIAGNOSTIC is defined.
Instead of caching the ucred reference, just go ahead and eat the
decerement and increment of the refcount.  Now that Giant is pushed down
into crfree(), we no longer have to get Giant in the common case.  In the
case when we are actually free'ing the ucred, we would normally free it on
the next kernel entry, so the cost there is not new, just in a different
place.  This also removse td_cache_ucred from struct thread.  This is
still only done #ifdef DIAGNOSTIC.

Tested on:	i386, alpha
2002-03-20 21:09:09 +00:00
Doug Rabson
a2763677ec Change intr_enable to intr_restore for consistency with sparc64. 2002-03-20 17:28:40 +00:00
Doug Rabson
c526161420 Replace calls to cpu_critical_enter/exit with appropriate calls to
either explicitly disable interrupts or use a real critical section,
as appropriate.
2002-03-20 10:04:08 +00:00
Doug Rabson
95f7adfa1a Recreate intr_disable/intr_enable and implement cpu_critical_enter/exit
in terms of that (for now).
2002-03-20 10:00:05 +00:00
Peter Wemm
3acb2ae91f #if 0 some unused variables (only in #if 0 code) 2002-03-19 12:15:29 +00:00
Peter Wemm
bfed03d6df Enabling the SKI option is a guaranteed breakage for me. Interrupts no
longer work.
I can only get a box to boot with 'options SMP'.
2002-03-19 11:21:12 +00:00
Peter Wemm
5044ed104d My ia64 box for some reason likes to fragment the beginning/end of memory
a bit before handing it over to the OS.  I occasionally have 11
segments with several 8K or so fragments depending on nvram settings and
what I have done under loader(8) before booting.  This needs to be
revisited.
2002-03-19 11:18:47 +00:00
Peter Wemm
3b406873c7 Fix some unused variables. 2002-03-19 11:15:26 +00:00
Peter Wemm
12adcbdf35 Move a couple of prototypes together instead of being incompletely
scattered around.
2002-03-19 11:14:52 +00:00
Peter Wemm
6d4a5aee06 __func__ is a const char *, not a "string" that can be concatenated. 2002-03-19 11:11:37 +00:00
Peter Wemm
90f9252584 Fix a pointer/int warning 2002-03-19 11:10:30 +00:00
Peter Wemm
21eec46f33 #ifdef SMP some variables that are only used elsewhere under #ifdef SMP
also.
2002-03-19 11:10:03 +00:00
Peter Wemm
34adf9e4f1 Work around an apparent compiler bug with gcc-3.1, although it might be
a language feature that I do not know about.  gcc is complaining about
a left shift >= sizeof type, even when shifting a (cast) 64 bit type left
by 43 bits.
2002-03-19 11:09:24 +00:00
Peter Wemm
51ea8b33df Believe it or not, I ran into the 32MB stack size limit using a natively
hosted gcc.
2002-03-19 11:07:09 +00:00
Peter Wemm
e42d7cebec #if 0 out some unused code. 2002-03-19 11:06:01 +00:00
Peter Wemm
675ceea82b Add some #includes after things got broken with the last round of
MI include file (<sys/smp.h> I think) tweaks.
2002-03-19 11:05:07 +00:00
Peter Wemm
4ff9e8d5e5 Turn off the ia64 ITC timecounter when SMP is present since it has the
same problem as the TSC on the x86 - ie: it is not synchronized.
#if 0 out some unused functions, ia64 doesn't calibrate clocks yet.
2002-03-19 11:03:48 +00:00
Jeff Roberson
8355f576a9 This is the first part of the new kernel memory allocator. This replaces
malloc(9) and vm_zone with a slab like allocator.

Reviewed by:	arch@
2002-03-19 09:11:49 +00:00
Doug Rabson
568a940b99 Fix spelling. 2002-03-18 09:29:16 +00:00
Dag-Erling Smørgrav
a2e0658045 Move the definition of PT_[GS]ET{,DB,FP}REGS from the MD ptrace.h to the
MI ptrace.h, since all platforms define them.  Keep the MD ptrace.h around
for FIX_SSTEP (which is currently only needed on Alpha).
2002-03-16 00:25:53 +00:00
Doug Rabson
0ab3e3b15a * Stop other cpus when one cpu enters DDB and restart them after it
leaves.
* Add a sync.i instruction to the code which writes out breakpoints to
  ensure that the breakpoint is seem by all cpus in the coherence domain.
2002-03-15 11:12:08 +00:00
Doug Rabson
fa45345e6e * Remove a breakpoint() I accidentally left in for debugging :-(.
* Make cpu_mp_probe() work before the VM system is available and
  initialise mp_maxid accordingly.
2002-03-15 09:47:16 +00:00
Doug Rabson
0f638cfaeb Tweak the AP startup code somewhat. With all the other recent changes,
this now works pretty well for two processors at least.

Submitted by: marcel, mostly.
2002-03-14 19:37:36 +00:00
Doug Rabson
34da0be411 * Initialise pcb_pmap for new threads.
* Add support for forking new threads from &thread0 as well as curthread.
2002-03-14 19:34:50 +00:00
Doug Rabson
92e814dcb6 * Save and restore PCPU_GET(current_pmap) in pcb_pmap so that we don't
lose if a process is preempted while pmap is temporarily switched to
  another pmap.
* For SMP, drop the high-fp state when a thread is switched away from
  so that if another cpu resumes that thread, it doesn't have to play
  games with IPI to get ahold of the correct register values.
2002-03-14 19:33:03 +00:00
Doug Rabson
48f7cc3fed Add pcpu.pc_current_pmap and pcb.pcb_pmap. 2002-03-14 19:20:24 +00:00
Doug Rabson
a9521dec8b Add a field to hold the current pmap of a thread. 2002-03-14 19:19:49 +00:00
Doug Rabson
17ea508863 Add ia64_sync_i(), ia64_get_tpr() and ia64_set_tpr(). 2002-03-14 12:29:55 +00:00
Doug Rabson
0323b941f0 * Add some KTR messages for IPIs.
* Don't call ast() from interrupt() - if we switch, then we will miss
  writing cr.eoi which will prevent the current cpu from receiving
  interrupts until the current thread is resumed. The call to ast()
  happens magically in exception_restore where it is safe.
* Add DDB 'show irq' command to examine interrupt hardware state.
2002-03-14 10:24:00 +00:00
Doug Rabson
838ba419e9 Add debug code to print SAPIC registers. 2002-03-14 10:17:08 +00:00
Doug Rabson
2750f739f9 * Use a mutex to protect the RID allocator.
* Use ptc.g instead of ptc.l so that TLB shootdowns are broadcast to the
  coherence domain.
* Use smp_rendezvous for pmap_invalidate_all to ensure it happens on all
  cpus.
* Dike out a DIAGNOSTIC printf which didn't compile.
* Protect the internals of pmap_install with cpu_critical_enter/exit.
2002-03-14 09:28:05 +00:00
Doug Rabson
26c01501cd Move the call to pmap_bootstrap to after the initialisation of thread0.
This allows us to use mutexes in pmap safely. Also initialise fpcurthread
for cpu0 so that ia64_fpstate_check doesn't barf during boot.
2002-03-14 09:20:07 +00:00
Doug Rabson
b81b083819 Don't restore r13 when returning to kernel mode. We may have migrated to
a different cpu since the exception_save and r13 needs to point at the
current cpu's pcpu structure.
2002-03-14 00:28:10 +00:00
Peter Wemm
841390683c Fix some -Wunused warnings by "using" a macro argument 2002-03-12 00:19:14 +00:00
Peter Wemm
a84c6cd303 Fix a warning (make ucontext_t *ucp a const) 2002-03-12 00:18:20 +00:00
Peter Wemm
db593b65d2 Stop concatenating __func__ with strings 2002-03-12 00:17:45 +00:00
Peter Wemm
e64c73a9f0 Deal with a structure member rename in a recent acpica import 2002-03-12 00:15:57 +00:00
John Baldwin
bb7d54e8c7 Fix a misspelling of mine: s/optomization/optimization/.
Noticed by:	bmilekic
2002-03-11 19:58:53 +00:00
Doug Rabson
a914a17e1d Add an implementation of cpu_throw() and make restorectx() simply branch
to the tail of cpu_switch.
2002-03-10 20:20:31 +00:00
Doug Rabson
f0ec35cae4 Don't try to print the arguments if the value of bsp is outside the
kernel - its asking for trouble.
2002-03-10 20:19:32 +00:00
Doug Rabson
a7f314ea94 Use the right value for the region length in parse_spill_mask. 2002-03-10 17:03:45 +00:00
Mike Barcroft
d846855da8 o Don't require long long support in bswap64() functions.
o In i386's <machine/endian.h>, macros have some advantages over
  inlines, so change some inlines to macros.
o In i386's <machine/endian.h>, ungarbage collect word_swap_int()
  (previously __uint16_swap_uint32), it has some uses on i386's with
  PDP endianness.

Submitted by:	bde

o Move a comment up in <machine/endian.h> that was accidentially moved
  down a few revisions ago.
o Reenable userland's use of optimized inline-asm versions of
  byteorder(3) functions.
o Fix ordering of prototypes vs. redefinition of byteorder(3)
  functions, so that the non-GCC (libc asm) case has proper
  prototypes.
o Add proper prototypes for byteorder(3) functions in <sys/param.h>.
o Prevent redundant duplicate prototypes by making use of the
  _BYTEORDER_PROTOTYPED define.
o Move the bswap16(), bswap32(), bswap64() C functions into MD space
  for platforms in which asm versions don't exist.  This significantly
  reduces the complexity of some things at the cost of duplicate code.

Reviewed by:	bde
2002-03-09 21:02:16 +00:00
Jake Burkholder
74acd9bb58 Include machine/smp.h. 2002-03-07 04:48:17 +00:00
Marcel Moolenaar
2242af42cf Call ast() only when we're handling a user trap. 2002-03-05 06:13:22 +00:00
Doug Rabson
2d0639e55d Add PSEUDOFS. 2002-03-04 18:01:56 +00:00
Doug Rabson
1fc142b38f Add emulation support for PAL_VM_SUMMARY. 2002-03-04 12:47:47 +00:00
Doug Rabson
08cece4091 * Include <sys/ucontext.h> so that this compiles again.
* Move the section which manipulates ia64_pal_base to after cninit() so
  that we don't risk printing anything before we have a console.
* Don't call ia64_probe_sapics() for a SKI build. This should really
  be dependant on ACPICA being present or something.
2002-03-03 19:23:15 +00:00
Andrew R. Reiter
66c862bc1b - Move a comment from being on the same line as a #ifdef to the line
following it.  This should have gone in the previous commit, but
  misviewed Bruce's patch.

Requested by: bde
2002-02-28 21:52:08 +00:00
Andrew R. Reiter
216ae18217 - Fix panic() message and a couple style nits that snuck in from the
recent diagnostics commit (rev. 1.84).
2002-02-28 08:28:14 +00:00
John Baldwin
a854ed9893 Simple p_ucred -> td_ucred changes to start using the per-thread ucred
reference.
2002-02-27 18:32:23 +00:00
Mike Silbersack
7f3a40933b Fix a horribly suboptimal algorithm in the vm_daemon.
In order to determine what to page out, the vm_daemon checks
reference bits on all pages belonging to all processes.  Unfortunately,
the algorithm used reacted badly with shared pages; each shared page
would be checked once per process sharing it; this caused an O(N^2)
growth of tlb invalidations.  The algorithm has been changed so that
each page will be checked only 16 times.

Prior to this change, a fork/sleepbomb of 1300 processes could cause
the vm_daemon to take over 60 seconds to complete, effectively
freezing the system for that time period.  With this change
in place, the vm_daemon completes in less than a second.  Any system
with hundreds of processes sharing pages should benefit from this change.

Note that the vm_daemon is only run when the system is under extreme
memory pressure.  It is likely that many people with loaded systems saw
no symptoms of this problem until they reached the point where swapping
began.

Special thanks go to dillon, peter, and Chuck Cranor, who helped me
get up to speed with vm internals.

PR:		33542, 20393
Reviewed by:	dillon
MFC after:	1 week
2002-02-27 18:03:02 +00:00
Thomas Moestl
90ce56c287 Add the following functions/macros to support byte order conversions and
device drivers for bus system with other endinesses than the CPU (using
interfaces compatible to NetBSD):

- bwap16() and bswap32(). These have optimized implementations on some
  architectures; for those that don't, there exist generic implementations.
- macros to convert from a certain byte order to host byte order and vice
  versa, using a naming scheme like le16toh(), htole16().
  These are implemented using the bswap functions.
- stream bus space access functions, which do not perform a byte order
  conversion (while the normal access functions would if the bus endianess
  differs from the CPU endianess).

htons(), htonl(), ntohs() and ntohl() are implemented using the new
functions above for kernel usage. None of the above interfaces is currently
exported to user land.

Make use of the new functions in a few places where local implementations
of the same functionality existed.

Reviewed by:	mike, bde
Tested on alpha by:	mike
2002-02-27 17:16:18 +00:00
Julian Elischer
77c4066424 Add some DIAGNOSTIC code.
While in userland, keep the thread's ucred reference in a shadow
field so that the usual place to store it is NULL.
If DIAGNOSTIC is not set, the thread ucred is kept valid until the next
kernel entry, at which time it is checked against the process cred
and possibly corrected. Produces a BIG speedup in
kernels with INVARIANTS set. (A previous commit corrected it
for the non INVARIANTS case already)

Reviewed by:	dillon@freebsd.org
2002-02-22 23:58:22 +00:00
Poul-Henning Kamp
1cbb9c3b03 Convert p->p_runtime and PCPU(switchtime) to bintime format. 2002-02-22 13:32:01 +00:00
Julian Elischer
db170a83d5 Duplicate the changes to i386 to keep creds over the user boundary. 2002-02-19 03:16:50 +00:00
Mike Barcroft
d1f7a1b79c Add C++ support. 2002-02-19 02:17:16 +00:00
Mike Barcroft
fd8e4ebc8c o Move NTOHL() and associated macros into <sys/param.h>. These are
deprecated in favor of the POSIX-defined lowercase variants.
o Change all occurrences of NTOHL() and associated marcros in the
  source tree to use the lowercase function variants.
o Add missing license bits to sparc64's <machine/endian.h>.
  Approved by: jake
o Clean up <machine/endian.h> files.
o Remove unused __uint16_swap_uint32() from i386's <machine/endian.h>.
o Remove prototypes for non-existent bswapXX() functions.
o Include <machine/endian.h> in <arpa/inet.h> to define the
  POSIX-required ntohl() family of functions.
o Do similar things to expose the ntohl() family in libstand, <netinet/in.h>,
  and <sys/param.h>.
o Prepend underscores to the ntohl() family to help deal with
  complexities associated with having MD (asm and inline) versions, and
  having to prevent exposure of these functions in other headers that
  happen to make use of endian-specific defines.
o Create weak aliases to the canonical function name to help deal with
  third-party software forgetting to include an appropriate header.
o Remove some now unneeded pollution from <sys/types.h>.
o Add missing <arpa/inet.h> includes in userland.

Tested on:	alpha, i386
Reviewed by:	bde, jake, tmm
2002-02-18 20:35:27 +00:00
Garrett Wollman
3b7a4c4b1d Resurrect one of the easiest changes from my big include files roll-up
patch from a year ago: give file flags their own type.  This does not
(yet) change the type used by system calls or library functions.
The underlying type was chosen to match what is returned by stat().
2002-02-15 22:15:39 +00:00
Robert Watson
92b98fdabe Remove WITNESS from GENERIC by default: as we grow more locks, this gets
slower, and may be impeding adoption of -CURRENT by developers.  We
recommend turning on WITNESS by default on crash boxes, and when doing
locking development.  It will probably get turned on by default for a week
or two following any major locking commits, also.

Approved by:	all and sundry (jhb, phk, ...)
2002-02-13 07:44:59 +00:00
Julian Elischer
079b7badea Pre-KSE/M3 commit.
this is a low-functionality change that changes the kernel to access the main
thread of a process via the linked list of threads rather than
assuming that it is embedded in the process. It IS still embeded there
but remove all teh code that assumes that in preparation for the next commit
which will actually move it out.

Reviewed by: peter@freebsd.org, gallatin@cs.duke.edu, benno rice,
2002-02-07 20:58:47 +00:00
Poul-Henning Kamp
e0ee6f5629 GC the PC_SWITCH* symbols which are not used in assembly anymore. 2002-02-07 10:27:58 +00:00
Bruce Evans
55a9536b65 Compile osigreturn() unconditionally since it will always be needed on
some arches and the syscall table is machine-independent.  It was
(bogusly) conditional on COMPAT_43, so this usually makes no difference.

ia64: in addition:
- replace the bogus cloned comment before osigreturn() by a correct one.
  osigreturn() is just a stub fo ia64's.
- fix the formatting of cloned comment before sigreturn().
- fix the return code.  use nosys() instead of returning ENOSYS to get
  the same semantics as if the syscall is not in the syscall table.
  Generating SIGSYS is actually correct here.
- fix style bugs.

powerpc: copy the cleaned up ia64 stub.  This mainly fixes a bogus comment.

sparc64: copy the cleaned up the ia64 stub, since there was no stub before.
2002-02-01 15:44:03 +00:00
Marcel Moolenaar
57aace23d5 Add a definition of ddb_regs. ddb_regs is declared as extern in
db_machdep.h to fix the link failure (multiple definitions)
caused by disabling the emission of common symbols. As a result,
there were no definitions at all. While here, remove useless
declarations.
2002-01-18 07:55:23 +00:00
Marcel Moolenaar
7fdc2e1a11 Remove the definition of bootverbose. This fixes the link failure
caused by disabling the emission of common symbols.
2002-01-18 07:49:37 +00:00
Marcel Moolenaar
48ceef34eb Declare ddb_regs as extern to avoid creating a tentative definition.
This fixes the link failure caused by disabling the emission of
common symbols.
2002-01-18 07:47:38 +00:00
Peter Wemm
ead8168ac0 Convert a bunch of 1 << PCPU_GET(cpuid) to PCPU_GET(cpumask). 2002-01-05 09:41:37 +00:00
John Baldwin
c86b6ff551 Change the preemption code for software interrupt thread schedules and
mutex releases to not require flags for the cases when preemption is
not allowed:

The purpose of the MTX_NOSWITCH and SWI_NOSWITCH flags is to prevent
switching to a higher priority thread on mutex releease and swi schedule,
respectively when that switch is not safe.  Now that the critical section
API maintains a per-thread nesting count, the kernel can easily check
whether or not it should switch without relying on flags from the
programmer.  This fixes a few bugs in that all current callers of
swi_sched() used SWI_NOSWITCH, when in fact, only the ones called from
fast interrupt handlers and the swi_sched of softclock needed this flag.
Note that to ensure that swi_sched()'s in clock and fast interrupt
handlers do not switch, these handlers have to be explicitly wrapped
in critical_enter/exit pairs.  Presently, just wrapping the handlers is
sufficient, but in the future with the fully preemptive kernel, the
interrupt must be EOI'd before critical_exit() is called.  (critical_exit()
can switch due to a deferred preemption in a fully preemptive kernel.)

I've tested the changes to the interrupt code on i386 and alpha.  I have
not tested ia64, but the interrupt code is almost identical to the alpha
code, so I expect it will work fine.  PowerPC and ARM do not yet have
interrupt code in the tree so they shouldn't be broken.  Sparc64 is
broken, but that's been ok'd by jake and tmm who will be fixing the
interrupt code for sparc64 shortly.

Reviewed by:	peter
Tested on:	i386, alpha
2002-01-05 08:47:13 +00:00
Marcel Moolenaar
200281abc1 Revert previous definition of cpu_throw(). Non-MP configurations
were broken as well.
2001-12-30 23:39:15 +00:00
Marcel Moolenaar
f3366cc25b Better implement SMP support:
o  Do not use a special struct to keep track of CPUs we found;
   instead, use struct pcpu. This handles all the magic WRT
   thread creation (yay!).
o  Respect MAXCPU.
o  Use the vhpt_base and vhpt_size values to initialize the AP.
o  Style fixes.

Note that this commit temporarily breaks SMP configurations.
Previously APs didn't do anything, but they now enter the
scheduler. They hold sched_lock for more than 5 secs though
and cause a panic. That's what I call progress :-)
2001-12-30 09:59:02 +00:00
Marcel Moolenaar
0f0658df4c o Reimplement map_pal_code to work with a global variable
ia64_pal_base instead of scanning the EFI tables. This way
   AP startup code can more easily use the function.
o  Initialize ia64_pal_base in ia64_init(). When the PAL code
   doesn't need explicit mapping or no PAL code has been found,
   ia64_pal_base will be 0.
o  Remove some unused global variables.
o  Also in ia64_init(), allocate only 1 page for struct pcpu
   and remove some Alpha leftovers.
o  Initialize pc_pcb in cpu_pcpu_init().
2001-12-30 09:49:39 +00:00
Marcel Moolenaar
7251648208 Make vhpt_base and vhpt_size globals so that they can be used by
the AP startup code.
2001-12-30 09:42:43 +00:00
Marcel Moolenaar
d9eba830b7 Cleanup the IPIs. 2001-12-30 09:41:29 +00:00
Marcel Moolenaar
9d31d833c2 Remove unused MD fields (pc_pending_ipis, pc_next_asn and
pc_current_asngen) and add SMP specific fields (pc_pcb,
pc_lid and pc_awake).
2001-12-30 09:39:41 +00:00
Marcel Moolenaar
badb73a5ba o Remove temporary implementation of cpu_throw in vm_machdep.c
and instead make it an alternate entry-point of cpu_switch()
   in swtch.s
o  Add SMP support to cpu_switch().
2001-12-30 09:34:51 +00:00
Marcel Moolenaar
45cc363828 Draft implementation of IPI handling. 2001-12-30 09:24:29 +00:00